package kr.hkit.powerjava.chapter22.collection;

import java.util.HashMap;
import java.util.Map;

public class WordFreq {
	public static void main(String[] args) {
		Map<String, Integer> m= new HashMap<String, Integer>();
		String [] sample={"to","be","or","not","to","be","is","a","problem"};
		for(String a:sample){
			Integer freq=m.get(a);
			m.put(a, (freq==null)?1:freq+1);
		}
		System.out.println(m.size()+"단어가 있습니다");
		System.out.println(m.containsKey("to"));
		System.out.println(m.isEmpty());
		System.out.println(m);
	}
}
